Linear trichromium complexes with direct Cr to Cr contacts. 2. Compounds with Cr3(dipyridylamide)4(3+) cores. Academic Article

abstract

• Seven compounds having in common a Cr3(dpa)4(3+) core (dpa = di(2-pyridyl)amide ion) have been prepared and all shown to have an unsymmetrical chain of three Cr atoms. This chain can be described as a pair of quadruply bonded Cr(II) atoms to which a Cr(III) atom is attached. No symmetrical chain has been found, contrary to a previous preliminary report. The seven compounds have been well characterized crystallographically, and their short and long Cr to Cr distances (A, in parentheses) are: 1 [Cr3(dpa)4Cl2]Cl.2CH2Cl2.THF (2.12, 2.47), 2 [Cr3(dpa)4Cl2]AlCl4.CH2Cl2 (2.011, 2.555), 3 [Cr3(dpa)4Cl2]FeCl4.CH2Cl2 (2.009, 2.562), 4 [Cr3(dpa)4Cl2]I3.THF.2H2O (2.08, 2.49), 5 [Cr3(dpa)4Cl2]PF6.2CH2Cl2 (2.08, 2.48), 6 [Cr3(dpa)4(BF4)F]BF4.2CH2Cl2 (1.900, 2.595), 7 [Cr3(dpa)4ClF]BF4.CH2Cl2.C6H14 (2.039, 2.507). Magnetic susceptibility measurements on 1 and 2 reveal mueff = 3.85 +/- 0.05 muB from 10 to 300 K.

authors

• Dunbar, Kim

published proceedings

• Inorg Chem

author list (cited authors)

• Clrac, R., Cotton, F. A., Daniels, L. M., Dunbar, K. R., Murillo, C. A., & Pascual, I.

citation count

• 72

complete list of authors

• Clérac, R||Cotton, FA||Daniels, LM||Dunbar, KR||Murillo, CA||Pascual, I

publication date

• February 2000

publisher

• American Chemical Society (ACS)  Publisher

published in

• Inorganic Chemistry  Journal

keywords

• 0302 Inorganic Chemistry

PubMed Central ID

• 11272572

Digital Object Identifier (DOI)

• 10.1021/ic991022t

start page

• 752

end page

• 756

volume

• 39

issue

• 4

URL

• http://dx.doi.org/10.1021/ic991022t